Revealing the local structural change of metal halide perovskites (MHPs) induced by external conditions is important to understand its performance and stability in optoelectronic applications. However, previous studies on properties structures MHPs are usually limited spatial resolution probe, it still challenging obtain atomic information real space. In this work, integrated differential-phase-contrast scanning transmission electron microscopy applied low-dose imaging CsPbI3 quantum dots...

Designing molecular catalysts to enhance hydrogen evolution activity presents both great significance and challenges. In hydrogenases, the redox group (i.e., [4Fe4S] subcluster) near catalytic active center [2Fe2S] plays...

Analysis on a developed dynamic model of the dish-Stirling (DS) system shows that maximum solar energy harness can be realized through controlling Stirling engine speed.Toward this end, control scheme is proposed for doubly fed induction generator coupled to DS system, as means achieve power point tracking insolation level varies.Furthermore, adopted fuzzy supervisory technique shown effective in temperature receiver speed changes.Simulation results and experimental measurements validate...

A novel strategy for the large scale, continuous production of aligned carbon nanotube arrays using millimeter‐diameter spheres as growth substrates is reported (see figure and cover). The present technique more productive than conventional process on flat wafers because higher available surface good fluidity spherical substrates. It can be adapted industrial application with lengths up to one millimeter.

Abstract We derive explicit asymptotic formulae for the joint moments of $n_{1}$-th and $n_{2}$-th derivatives characteristic polynomials Circular Unitary Ensemble random matrices any non-negative integers $n_{1}, n_{2}$. These are expressed in terms determinants whose entries involve modified Bessel functions first kind. also express them two types combinatorial sums. Similar results obtained analogue Hardy’s $Z$-function. use these to formulate general conjectures Riemann zeta-function Our...

Abstract In a companion paper (Keating and Wei 2023 Int. Math. Res. Not. 2024 9607–32), we established asymptotic formulae for the joint moments of higher order derivatives characteristic polynomials CUE random matrices. The leading coefficients these are expressed as partition sums determinants Hankel matrices involving I-Bessel functions, with column indices shifted by Young diagrams. this paper, continue study establish more properties their coefficients, including structure theorems...

This paper presents a novel inductive tuning method for 60GHz voltage controlled oscillator (VCO) design. A new inductor-loaded transformer is proposed by configuring different current return-paths in the secondary coil of transformer. Different from published methods, topology can achieve multi-band, wide range within compact area using only one VCO implemented at 65nm CMOS process demonstration. The obtained oscillation frequency vary 51.9GHz to 67.3GHz, which covers full band and provides 25.8%.

We investigate Sarnak's M\"obius Disjointness Conjecture through asymptotically periodic functions. It is shown that conjecture for rigid dynamical systems equivalent to the disjointness of from give sufficient conditions and a partial answer later one. As an application, we show holds class systems, which improves earlier result Kanigowski-Lema{\'{n}}czyk-Radziwi{\l}{\l}.

As both fluid flow measurement techniques and computer simulation methods continue to improve, there is a growing need for numerical approaches that can assimilate experimental data into the in flexible mathematically consistent manner. The problem of interest here blood left ventricle with assimilation provided by ultrasound imaging microbubbles blood. weighted least-squares finite element method used because it allows be assimilated very manner so accurate measurements are more closely...

A digitally-assisted CMOS 60GHz PA is reported with high output power and improved efficiency during back-off. To combine large number of transistors within compact area, a 2D distributed in-phase combiner utilized. Moreover, self-tuning biasing introduced for back-off improvement, where DC reduced along power. One 4-way power-combined prototype was implemented in 65nm process measured 17.2dBm, PAE 11.3%, up to 170~190% improvement the entire 7GHz band at 60GHz.

Controlled Synthesis The commercialization of carbon nanotubes (CNTs) depends on rapid development in precise structure control and morphological assembly technology. In article number 2109401, Weizhong Qian, Fei Wei, co-workers summarize the catalytic growth mechanism defect-free CNTs. template-assisted is subsequently introduced as an efficient route towards their mass production. Finally, more cutting-edge applications are presented with potential breakthroughs fibers, energy, electronics.

The joint moments of the derivatives characteristic polynomial a random unitary matrix, and also variant that is real on unit circle, in large matrix size limit, have been studied intensively past twenty five years, partly relation to conjectural connections Riemann zeta-function Hardy's function. We completely settle most general version problem convergence these moments, after they are suitably rescaled, for an arbitrary number with positive exponents. Our approach relies hidden,...

We consider the derivative of characteristic polynomial $N \times N$ Haar distributed unitary matrices. In limit \to \infty$, we give a formula for general non-integer moments values spectral variable inside unit disc. The obtain is given in terms confluent hypergeometric function. an extension this result to joint taken at different points, again valid moment orders. For integer moments, our results simplify and are expressed as single Laguerre polynomial. Using these formulae, derive mean...

We derive explicit asymptotic formulae for the joint moments of $n_1$-th and $n_2$-th derivatives characteristic polynomials CUE random matrices any non-negative integers $n_1, n_2$. These are expressed in terms determinants whose entries involve modified Bessel functions first kind. also express them two types combinatorial sums. Similar results obtained analogue Hardy's $Z$-function. use these to formulate general conjectures Riemann zeta-function Our supported by comparison with...